/*
 * MIT License
 *
 * Copyright (c) 2023 北京凯特伟业科技有限公司
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.je.bpm.engine.impl.bpmn.listener;

import com.je.bpm.engine.ActivitiException;
import com.je.bpm.engine.ActivitiIllegalArgumentException;
import com.je.bpm.engine.delegate.DelegateTask;
import com.je.bpm.engine.delegate.Expression;
import com.je.bpm.engine.delegate.TaskListener;
import com.je.bpm.engine.impl.bpmn.helper.DelegateExpressionUtil;
import com.je.bpm.engine.impl.bpmn.parser.FieldDeclaration;
import com.je.bpm.engine.impl.context.Context;
import com.je.bpm.engine.impl.delegate.invocation.TaskListenerInvocation;
import java.util.List;

public class DelegateExpressionTaskListener implements TaskListener {

    protected Expression expression;
    private final List<FieldDeclaration> fieldDeclarations;

    public DelegateExpressionTaskListener(Expression expression, List<FieldDeclaration> fieldDeclarations) {
        this.expression = expression;
        this.fieldDeclarations = fieldDeclarations;
    }

    @Override
    public void notify(DelegateTask delegateTask) {
        Object delegate = DelegateExpressionUtil.resolveDelegateExpression(expression, delegateTask, fieldDeclarations);
        if (delegate instanceof TaskListener) {
            try {
                Context.getProcessEngineConfiguration().getDelegateInterceptor().handleInvocation(new TaskListenerInvocation((TaskListener) delegate, delegateTask));
            } catch (Exception e) {
                throw new ActivitiException("Exception while invoking TaskListener: " + e.getMessage(), e);
            }
        } else {
            throw new ActivitiIllegalArgumentException("Delegate expression " + expression + " did not resolve to an implementation of " + TaskListener.class);
        }
    }

    /**
     * returns the expression text for this task listener. Comes in handy if you want to check which listeners you already have.
     */
    public String getExpressionText() {
        return expression.getExpressionText();
    }

}
